import { asyncRoutes, constantRoutes } from '@/router'
import { leftClass } from '@/api/left-article'
/* Layout */
import Layout from '@/layout'
// import role from "@/views/permission/role"

/**
 * Use meta.role to determine if the current user has permission
 * @param roles
 * @param route
 */
function hasPermission(roles, route) {
  if (route.meta && route.meta.roles) {
    return roles.some(role => route.meta.roles.includes(role))
  } else {
    return true
  }
}

/**
 * Filter asynchronous routing tables by recursion
 * @param routes asyncRoutes
 * @param roles
 */
export function filterAsyncRoutes(routes, roles) {
  const res = []
  routes.forEach(route => {
    const tmp = { ...route }
    if (hasPermission(roles, tmp)) {
      if (tmp.children) {
        tmp.children = filterAsyncRoutes(tmp.children, roles)
      }
      res.push(tmp)
    }
  })

  return res
}
const urlBack = {}

const state = {
  routes: [],
  addRoutes: []
}

const mutations = {
  SET_ROUTES: (state, routes) => {
    state.addRoutes = routes
    state.routes = constantRoutes.concat(routes)
  }
}

const actions = {
  generateRoutes({ commit }, roles) {
    return new Promise(resolve => {
      let accessedRoutes
      leftClass().then(response => {
        const data = response.data
        for (let i = 0; i < data.length; i++) {
          if (urlBack[data[i].url] === 1) {
            continue
          }
          urlBack[data[i].url] = 1
          asyncRoutes.push({
            path: data[i].url,
            component: Layout,
            children: [
              {
                path: '',
                component: (resolve) => require(['@/views' + data[i].url], resolve),
                name: data[i].name,
                meta: { title: data[i].name, icon: data[i].icon, noCache: true }
              }
            ]
          },)
        }
        if (roles.includes('admin')) {
          accessedRoutes = asyncRoutes || []
        } else {
          accessedRoutes = filterAsyncRoutes(asyncRoutes, roles)
        }
        commit('SET_ROUTES', accessedRoutes)
        resolve(accessedRoutes)
      })
    })
  }
}

export default {
  namespaced: true,
  state,
  mutations,
  actions
}
